Looking for a VST keyboard plugin

Not a real Studio One issue, but maybe you can help me anyway.

I'm looking for a VST plugin which is just a keyboard for input.
I have a 10 inch touchscreen Windows tablet.
At the moment I coect a Midi input device (USB), but I would like to use a simple
VST keyboard.
(So I won't depend on additional hardware.)
Important would be:
- recording Midi possible
- adjustable size (1 real octave would be perfect and possible)

Something like this looks good:

(Even though it is not a real octave.)

P.S. Studio One has a QWERTY keyboard, but this doesn't help me here.

Thanks for any help!